Boston Partners

Position in MPC — Marathon Petroleum Corp

CIK 1386060 BOSTON, MA

Back to MPC Full portfolio

Position in MPC

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$1,379,422,630

+$384,173,382 QoQ

Shares Held

5,649,204

-7.7% QoQ

Ownership

1.94%

of shares outstanding

% of Portfolio

1.46%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 82.09877002140479.ToString("F0")% Shared 0.ToString("F0")% None 17.901229978595214.ToString("F0")%

Common Shares in MPC Over Time

Shares Held

Position Value (USD)

Position in Oil & Gas Refining & Marketing

Energy · as of Mar 31, 2026

Boston Partners holds $1,680,610,135 across 3 Oil & Gas Refining & Marketing names. MPC ranks #1 (82.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MPC	Marathon Petroleum Corp This page	5,649,204	$1,379,422,630
2	PSX	Phillips 66	1,651,820	$300,928,566
3	VLO	Valero Energy Corp/Tx	1,048	$258,939

All Filings in MPC

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,379,422,630	5,649,204	-7.7%	Shares	Defined	2026-05-11
2025-12-31	$995,249,248	6,119,715	-2.9%	Shares	Other	2026-02-13
2025-09-30	$1,215,308,192	6,305,428	+2.3%	Shares	Other	2025-11-13
2025-06-30	$1,023,858,351	6,163,737	+13.1%	Shares	Other	2025-08-12
2025-03-31	$793,794,003	5,448,514	+58.5%	Shares	Defined	2025-05-13
2024-12-31	$479,420,207	3,436,704	+37.4%	Shares	Defined	2025-02-11
2024-09-30	$407,545,754	2,501,662	-2.4%	Shares	Other	2024-11-12
2024-06-30	$444,514,222	2,562,337	-7.6%	Shares	Defined	2024-08-14
2024-03-31	$558,769,575	2,773,050	+0.3%	Shares	Other	2024-05-28
2023-12-31	$410,152,197	2,764,574	-38.5%	Shares	Defined	2024-02-07
2023-09-30	$680,542,229	4,496,777	-13.2%	Shares	Defined	2023-11-08
2023-06-30	$604,317,276	5,182,824	-19.1%	Shares	Other	2023-08-10
2023-03-31	$864,189,242	6,409,473	-6.9%	Shares	Other	2023-05-09
2022-12-31	$801,345,031	6,884,999	-13.5%	Shares	Defined	2023-02-08
2022-09-30	$790,609,186	7,959,420	-9.4%	Shares	Defined	2022-11-09
2022-06-30	$722,366,689	8,786,847	-17.5%	Shares	Other	2022-08-10
2022-03-31	$910,176,825	10,645,343	-10.8%	Shares	Other	2022-05-10
2021-12-31	$763,511,657	11,931,734	-3.0%	Shares	Defined	2022-02-04
2021-09-30	$760,325,549	12,301,012	+1.0%	Shares	Defined	2021-11-05
2021-06-30	$735,729,745	12,176,924	+0.1%	Shares	Other	2021-08-12
2021-03-31	$651,014,966	12,170,779	+18.0%	Shares	Other	2021-05-10
2020-12-31	$426,634,312	10,315,143	-9.7%	Shares	Other	2021-02-10
2020-09-30	$335,320,638	11,428,788	-4.1%	Shares	Defined	2020-11-13
2020-06-30	$445,342,253	11,913,918	+0.4%	Shares	Defined	2020-08-12
2020-03-31	$280,339,259	11,868,724	—	Shares	Defined	2020-05-13
No filing history on record for this holder in this stock.